linux-kernel - Re: [PATCH v2] soundwire: qcom: allow multi-link on newer devices

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Date: Thu, 11 Apr 2024 15:19:27 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Bard Liao <yung-chuan.liao@...ux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
	Sanyog Kale <sanyog.r.kale@...el.com>,
	linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v2] soundwire: qcom: allow multi-link on newer devices

On 05-04-24, 16:41, Krzysztof Kozlowski wrote:
> Newer Qualcomm SoCs like X1E80100 might come with four speakers spread
> over two Soundwire controllers, thus they need a multi-link Soundwire
> stream runtime.
> 
> Cc: Mark Brown <broonie@...nel.org>
> Cc: alsa-devel@...a-project.org
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Changes in v2:
> 1. Only rebase (slightly different context)

Applying /tmp/v2_20240405_krzysztof_kozlowski_soundwire_qcom_allow_multi_link_on_newer_devices.mbx
Applying: soundwire: qcom: allow multi-link on newer devices
error: drivers/soundwire/qcom.c: does not match index
Patch failed at 0001 soundwire: qcom: allow multi-link on newer devices

This fails as well :-(


> ---
>  drivers/soundwire/qcom.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index fb70afe64fcc..ce5cf3ecceb5 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -905,6 +905,18 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
>  	return 0;
>  }
>  
> +static int qcom_swrm_read_prop(struct sdw_bus *bus)
> +{
> +	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
> +
> +	if (ctrl->version >= SWRM_VERSION_2_0_0) {
> +		bus->multi_link = true;
> +		bus->hw_sync_min_links = 3;
> +	}
> +
> +	return 0;
> +}
> +
>  static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus,
>  						    struct sdw_msg *msg)
>  {
> @@ -1056,6 +1068,7 @@ static const struct sdw_master_port_ops qcom_swrm_port_ops = {
>  };
>  
>  static const struct sdw_master_ops qcom_swrm_ops = {
> +	.read_prop = qcom_swrm_read_prop,
>  	.xfer_msg = qcom_swrm_xfer_msg,
>  	.pre_bank_switch = qcom_swrm_pre_bank_switch,
>  };
> @@ -1173,6 +1186,15 @@ static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
>  
>  	mutex_lock(&ctrl->port_lock);
>  	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
> +		/*
> +		 * For streams with multiple masters:
> +		 * Allocate ports only for devices connected to this master.
> +		 * Such devices will have ports allocated by their own master
> +		 * and its qcom_swrm_stream_alloc_ports() call.
> +		 */
> +		if (ctrl->bus.id != m_rt->bus->id)
> +			continue;
> +
>  		if (m_rt->direction == SDW_DATA_DIR_RX) {
>  			maxport = ctrl->num_dout_ports;
>  			port_mask = &ctrl->dout_port_mask;
> -- 
> 2.34.1

-- 
~Vinod